Art of coiling hot metal stock



Sept. 8, 1931.

J. R. GEORGE ET AL ART OF COILING HOT METAL STOCK Filed Feb. 215, 1929 MW Uafi/afram ZZM Patented Sept 8, 1931 UNITED STATES PATENT ,CFFICE JEROME B. GEORGE AND FRANK P. DAHLSTROM, OF WORCESTER, MASSACHUSETTS, AS

SIGNORS TO IiIORGAN CONSTRUCTION COIVIPANY,

CORPORATION OF MASSACHUSETTS OF WORCESTER, MASSACHUSETTS, A

ART OF COILENG HOT METAL STOCK Application filed February 23, 1929. Serial No. S42,$23.

The present invention relates in general to the coiling of hot metal stock, such as rods, bars or the like, as delivered at high speed from the finishing passes of a rolling mill. In particular, the invention is concerned with the coiling, on a high speed automatic reel of the so-called pouring type, of stock whose finished section is other than round, an operation that heretofore has presented almost insuperable difficulties, because it has been impossible, in the presentation gravitationally of such stock to such a reel, to establish for the stock section, approaching the reel at an indeterminate and unstable inclination, the necessary constant relation to the vertical or substantially vertical axis of the reel.

In the case, for example, of stock of oblong or flat rectangular section, emerging flatwise from the finishing passes of the mill, the section must acquire a ninety degree twist, so that such relatively flat stock will pass by combined downward gravitational and forward movement onto the pouring reel in correct coiling position, i. e., with the major axis of the oblong section in parallelism, or nearly so, with the substantially vertical axis of rotation of the reel. But a twist once imparted to such stock continues indefinitely and its effect on such stock is cumulative; the advancing first end of the stock acquires more and more twist as its distance from the twisting instrumentality increases.

According to this invention, the stock is caused to pass downwardly and forwardly into the pouring reel, with its section turned or twisted into the desired relation to the reel axis, by imparting to said stock, at or near its point of delivery from the finishing rolls, a twist of lesser angular magnitude than that ultimately required; provision is made, in the absence of any undue restraining or frictional influences on the moving stock, for keeping this twist from getting out of control and forpositively stopping or counteracting the twisting tendency so set up, when and as the twist attains the desired angular magnitude, in order to eliminate any resultant twisting action in the stock after it gets on the reel. The manner in which the above and other objects and advantages of the invention may be attained is fully set forth in the following detailed description of said lnvention, taken in connection with the accompanying illustrative drawings, which Fig. l is a diagrammatic plan View showing an arrangement of coiling apparatus adapted to the carrying out of our invention. F 2 is a view in side elevation, and partly in section, on a larger scale, showing the mode of operation of the twist-imparting and twistcontrolling devices. I? 0 is a section of the flattened stock, as i 5 is a section much enlarged on the line 5-5 of Fig. 1.

Fig. 6 is the section represented by the two lines 68 of Fig. 2.

Like reference characters refer to like parts in the different figures.

Referring first to F l, the finishing rolls of a rolling mill, as indicated at 1, may be conventionally arranged for the delivery of the finished stock 2 to either or both of a pair of parallel pipes 3, 3, each of the latter alining with a suitable switching pipe 4, adapted to direct the stock, alternately or selectively as desired, to two or more reel-delivery pipes 5, 5. Each of these pipes 5, 5 provides a curved path which the stock takes to a constantly revolving reel 6 of the so-called automatic or continuous pouring type, whereon a plurality of fingers 7 provide the means by which the first end of the stock. as delivered into the reel, is caught and held, in the act of forming a coil on said reel within its inclosure 8. As best shown in Fig. 2, the path of the stock, as provided by each reel-delivery pipe 5, takes the usual and necessary downward inclination toward the reel, and said path also preferably, as shown in Fig, 1, has a distinct lateral curvature, for reasons which will hereinafter appear.

Assuming the finished stock to be of oblong or rectangular section and to emerge from the finishing rolls 1, 1 in the flatwise position indicated at a, Fig- 3, it is evident that said t appears in the plane of the line 3-3 of 4 is a section on the line H of Fig. 2.

stock, in order to be coiled on a reel 6, must be delivered to said reel on edge, rather than fiatwise, i. e., with its section upright, or twisted through ninety degrees from the position illustrated at a. To secure this result, or a similar result in the case of various other. sections whose reeling presents similar problems. we propose, as shown in the drawings, to impart to the stock, at or near its point of delivery from the finishing rolls 1, 1, a twist of considerably less magnitude than that ultimately required,-which latter, in the example herein considered, is, as stated ninety degrees. This twist in the stock, as delivered from the finishing rolls 1, 1 may be imparted in any suitable way, by the use of any known type of twist delivery guide or its equivalent, but we prefer to el'lect the same by passing the stock between a set of rollers 9, 9, here shown. as three in number, arranged in staggered relation, with their axes at a relatively low angle to the horizontal, so that the stock, in passing between said rollers, has its section slightly twisted. as shown at Z), Fig. l, from the iatwise position indicated at a in Fig. 3.

The angular magnitude of this twist dependent, to a considerable extent, upon the distance that the stock can run out before coming under the influence of the twistarresting instrumentalities, which, as hereinafter described, preferably take the form of a set of rollers 10, 19, of the same number and the same staggered arrangement as the rollers 9, 9, but having their axes, in this instance, where a. ninety degree twist is to be obtained, perpendicular, so as to receive and hold the stock section in the upright position shown at (Z in Fig. 6. T iat is to say, the twistdmparting rollers 9, 9 need ordinarily to have an axial inclination of only about ten degrees, for the ultimate production at the rollers 10, 10 of a ninety degree twist, it the distance bet-ween said sets of rollers 9, 9 and 10, 10 is, say, approximately ninety per cent of the total distance between the two holding points, i. e., the rolls 1, 1 and the rollers 10, 10. No hard and fast rule for determining the exact angular setting of the rollers 9, 9 in any given case can be formulated, because there are so many variable factors tha affect the twist that rapidly moving stock may acquire,for example, the inherent twisting tendency that such stock may have by reason of the finishing rolls being slightly crossed, or by reason of a variety of other causes;

The twisting rollers 9, 9 are preferably located, as shown, in relatively close pronimity to, say four to six feet from, the finishing rolls 1, 1 of the mill, so that the latter may serve more effectively as the holding point from which the twist is started. As shown in Fig. 1, each set of twisting rollers 9, 9 may be arranged between the pipe section 3 and the switching pipe l, but obviously our invention is not limited in this respect, as said twisting rollers could as well be located in either of these pipes, or, if desired, in the entrances to the several reel-delivery pipes 5, 5. As previously stated, the twist of relatively small magnitude imparted by the rollers 9, 9 attains a progressively greater magnitude as the stock runs out further and further in the reel delivery pipe 5, as shown for example in Fig. 5. The fact that each pipe 5 must incline downwardly toward the reel (5, as previously noted, makes it preterable to define with said pipe a path that curves laterally, as shown in Figs. 1 and 5, from a straight-line runout in the direction of delivery from the rolls 1, 1. By so curving the path in the horizontal plane, the desired downward curvature in the vertical plane can be obtained, without having to bend the stock on edge. Such a bending on edge, to obtain the desired downgrade movement toward the reel 6, would be required, it the stock were not allowed to deflect laterally beyond the rollers 9, 9,-unless the downward inclination is established between the finishing rolls 1, 1 and the twisting rollers 9, 9, a condition, however, that would increase the distance between those points. In the arrangement here shown, with the pipe 5 curved in both the horizontal and vertical plane, the short axis of the section, as shown in Fig. 5, comes approximately in the plane of bend of said pipe, and thus there is no undue resistance to the downward or the lateral bending.

In its movement between the twist-imparting rollers 9, 9 and the twist'arresting rollers 10, 1l),tl1e stock, as shown in Fig. 5, gradually becomes more and more upright, until full upright position is reached as it enters between the rollers 10, 10. In connection with said rollers 19, 10, as well as the preceding rollers 9, 9 and the succeeding rollers 11, 11, the staggered arrangement, as will be noted, lends itself to a relatively easy entrance of the stock, notwithstanding that the latters first end may be out of alinement or registry, either laterally or angular-1y, or both, with the passage that is provided between the sev eral staggered rollers of each set. For eX- ample, a glancing impact of the stock on the lirstencountered roller of such a set is found to be no hindrance to passing by the second roller, and the same condition holds true between the second and third rollers, whereas with, guides of di'l'l'erent character, such impact might well result in disastrous buckling of the rapidly moving stock. These roller guides prevent scratching of the stock, and moreover, the provisionof three staggered rollers, rather than two rollers in directly opposed relation. allows the stock to vary slightly in thickness, without need or making corresponding adjustments 0t said rollers.

ill)

As previously noted, the otfice' of the set of staggered rollers 10, 10 is to establish a hold on the stock as presented to said rollers,

in the present instance, in a condition that represents a. twist ofninety degrees from its fiatwise delivery by the finishing rolls 1, 1. With the stock so held, its subsequent and almost immediate passage through the similarly arranged set of rollers 11, 11 procures the removal, entirely, of the twisting tendency ori inally set up by the rollers 9, 9.

In other words, in substantially the same manner as the finishing rolls 1, l cooperate, as a holding point with the staggered twisting rollers 9, 9 to inaugurate the twist, so the vertical rollers 10, 10, as a holding point, render the other vertical rollers 11, ll eflective to remove all traces of said twist, whereby the stock, by reason of its immediately-following edgewise presentation to the reel 6, will have no tendency whatsoever to twist during the process of its being coiled up on said wheel.

We claim,

1. In apparatus of the class described, a pouring reel for the continuous reception and coiling of metal stock whose section other than round would normally approach said reel at an indeterminate and unstable inclination, and means operable on said stock on its way to said reel for establishing and maintaining at the entrance to said reel a predetermined relation between the reel axis and a particular axis of the stock section, thereby to secure its passage onto said reel in a sectional position permissive of the coiling operation.

2. The combination, with a pouring reel for the continuous reception and coiling of hot meta-l stock, as delivered from the mill with its section in a position other than that adapted for coiling, of means operable on said stock on its way to said reel for establishing and maintaining at the entrance to said reel a position of the stock section that is permiiisive of the coiling operation.

3. The combination, with a pouring reel for the gravitational reception and continuous coiling of hot metal stock, whose section as delivered from the mill, is in a position other than that adapted for coiling, of means for starting a twist in said stock, outwardly from its delivery point, such as to dispose said section in a position permissive of coiling before it reaches the reel, and means for thereupon stopping said twist and holding said stock section in said last named position, as it passes onto said reel.

i. The combination, with a pouring reel 60 for the gravitational reception and continuous coiling of hot metal stock, of means for starting av twist in said stock, outwardly of its delivery point, such as to establish a predetermined relation between the reel axis and a particular axis of the stock section before reaching the reel, and means for thereupon arresting said twist and holding the stock in said predetermined relation as it passes to the reel.

5. In apparatus of the class described, the combination with an automatic pouring reel for the gravitation reception and coiling of continuously delivered stock, of means acting on said stock adjacent its delivery point to establish in advance of reeling, a predetermined relation between the reelaxis and a particular axis of the stock section, and means acting thereafter on the stock to maintain said predetermined relation as the stock passes into said reel. I

6. Apparatus of the class described, for the reeling 01" continuously delivered hot metal stock whose section is other than round, comprising a pouring reel, means interposed between the delivery point of said stock and the reel, for first imparting a twist to said stock, and then arresting said twist, when a predetermined relation between the reel axis and a given axis of the stock section has been established by said twist.

7. Apparatus of the class described,for the reeling of continuously delivered hot metal stock whose tection is other than round, comprising a pouring reel, a twist guide adjacent the delivery point of said stock, and means for arresting the twist imparted by said guide when it has established a particular axis of the stock section in a predetermined relation to the axis of the reel.

8. Apparatus of the class described, for the reeling of continuously delivered hot metal stock whose section is other than round, comprisinga pouring reel, a twist guide adjacent the delivery point or" said stock, means for arresting the twist imparted by said guide when it has established a par ticular axis of the EiJOCk section in a predetermined relation to the axis of the reel, and means for holding said stock against further twisting as it passes into said reel.

9. Apparatus of the class described, for the reeling of continuously delivered hot metal stock whose section is other than round, comprising a pouring reel, a twist guide adjacent the delivery point of said stock, means for arresting the twist imparted by said guide when it has established the major axis of the stock section in a predetermined relation to the substantially vertical axis of the reel, and means for thereafter removing the twisting tendency of said stock, prior to its. passage into the reel.

10. Apparatus of the class described, for the reeling of continuously delivered hot metal stock whose section is other than round, comprising a pouring reel, means for imparting a twist to said stock, such as to establish at a predetermined point, a p0sition of the stock section relative to the substant-ially vertical reel axis that permits the stock to be coiled, means acting on said stock at said predetermined point to hold it in said position, and means beyond said point for removing the twisting tendency of said stock, whereby it passes onto the reel in the desired coiling position.

11. In the art of coiling hot metal stock, continuously delivered from the finishing rolls with its section in a position other than that adapted for coiling, the improvemei'it which consists in first in'iparting to said stock, near its delivery point, a twist of suil'icient n'iagnitude to establish a pourinj position 01 the section at a point in. advance of a pouring reel, and then removing, beyond said point, the twisting tendc cy previoi'lsly imparted.

12. In the art of coiling hot metal stock, continuously delivered from the finishing rolls with its section in a position other than that adapted for rolling, the improvement which consists in first imparting a predetermined twist to such stock, such as to turn the section into coiling position at a point in advance of the coiling reel, and etween said point and said reel procuring the complete removal of the twist previously imparted to raid stock.

13. In the art of coiling continuously dclivered hot metal stock, whose section at the finishing rolls emerges flatwise, the improvement which consists in first imparting a twist to said stool: near its point of delivery, whereby at a predetermined distance from said delivery point the stool; soc on will stand edge wise, in a position permissive of coiling, and from there on to a pouring reel, procuring the removal of the twist previously imparted to said stock.

14-. In the art of coiling continuously delivered hot metal stock whose section at the finishing rolls is in a position other than that adapted for coiling, the improvement which consists in first twisting said stock so that, at a predetermined point beyond said twisting point, its section will turn into a position permissive of coiling, then applying to said stock a restraining force to hold said section in said coiling position, and finally, between said restraining point and a pouring reel, removing all traces oi twist from said stock.

In the arto't coiling hot metal stock continuously delivered from finishing rolls with its section in a position other than that adapted for coiling, the improven'ient which consists in first passing said stock through a twist guide, whereby at a predetermined point beyond said guide, the stock section will be turned into coiling position, and then passing said stock through a succession of straightening guides to remove the twist and to hold the stock with its section in coiling position.

16. In apparatus of the class described,

for the continuous coiling of hot metal stock whose section is other than round, a twisting means operative on the stock near its delivery point and consisting of a plurality of rollers arranged in staggered. relation, for the passage of the stock therebetween.

17. in apparatus the class described, for the continuous coiling of hot metal stock whose section is other than round, a set of staggered roller adapted to impart a twist to the steel: near its delivery point, and a plurality of sets of similar rollers, with their axes at an angle to those of the first set, for removing the twist, prior to passage of the stock onto the reel.

18. In the art of coiling continuously delivered hot metal stock of a section other than round, the improvement which consists in starting a twist in said stock such as to establish at a predetermined point in its movement toward he reel, the desired substantial parallelism of the stock sections major axis to the substantially vertical reel axis, and then holding the stool; in the said substantially parallel relation and removing the twist therefrom.

l9. In the art oi": coiling continuously delivered hot metal stock of a section other than ronn l, the improvement which consists in starting a twist in said stock such as to estaolish at a predetermined point in its movement toward the gm-tiring reel the substantial parallelism of the stock sections major axis to the vertical aXis of said reel, directing the stock, beyond said twisting point in a path that slopes downwardly toward said reel, and beyond said predetermined point holding the stock in the said substantially parallel relation and removing the twist therefrom.

20. In the art of coiling continuously delivered hot metal stock of a section other than round, the inuiroveinent which consists in starting a twist in said stock such to es tablish at a p redetermined point in its movement toward the l the substantial parallelism of the stock sections major axis to the substantially vertical reel axis, directing the stools, beyond said twisting point, in a path that slopes downwardly toward said reel with a lateral deflection to avoid bending of the stool; on edge, and beyond said predetermined point holdin the stool: in the position aforesaid and removing the twist therefrom.

ill. The herein described method of coiling, on an automatic pmiring reel, continue sly delivered hot metal stock whose section is other than round, which consists in passing said stock, just beyond its point of delivery, between a of staggered rollers so arranged as to establish at a predetermined point in the stocks movement toward the reel substantial pa allelism of the major axis of the stock section to the reel axis, causing said stock on its way to said predetermined point to defleet laterally and downwardly from the line of its delivery from the finishing rolls of the mill, passing said stock at said predetermined point between a second set of staggered rollers whose contact with the section holds it in the aforesaid parallel relation, and thereafter passing said stock between a third set of staggered rollers, arranged to hold said section in said parallel relation as the stock passes onto the reel.

22. The method of presenting edgewise to an. automatic pouring reel, strip material whose delivery is flatwise, which consists in initiating in the fiatwise-delivered material a twist of such magnitude and at such a distance from the reel as will produce the de sired edgewise position of the strip before it reaches the reel, and from there on holding the strip against twisting.

23. In apparatus of the class described, the combination with an automatic pouring reel, of means for presenting thereto, in a substantially edgewise or coiling position, strip material whose position at its delivery point is substantially flatwise, and means for restraining said strips attainment of edgewise position until it reaches the entrance to said reel.

24. In apparatus of the class described, the combination with an automatic pouring reel, of means for presenting thereto, in a substantially edgewise or coiling position, strip material whose position at its delivery point is substantially flatwise, said means comprising twist-imparting devices so spaced from the reel as to produce in said material only as it substantially reaches the entrance to said reel, the magnitude of twist that es tablishes its edgewise position.

25. In apparatus of the class described, the combination with an automatic pouring reel, of means for presenting thereto, in a substantially edgewise or coiling position, strip material whose position at its delivery point is substantially flatwise, said means comprising twist-imparting devices so spaced from the reel as to produce in said material only as it substantially reaches the entrance to said reel, the magnitude of twist that establishes its edgewise position, and means at said reel entrance for removing the twisting tendency produced by said twist-imparting devices.

JEROME R. GEORGE. FRANK P. DAHLSTROM. 

